mirror of
https://github.com/f4exb/sdrangel.git
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157 lines
4.7 KiB
C++
157 lines
4.7 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2019 Edouard Griffiths, F4EXB //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#include "dsp/devicesamplesink.h"
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#include "localsourcethread.h"
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#include "localsourcesource.h"
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LocalSourceSource::LocalSourceSource() :
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m_running(false),
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m_sinkThread(nullptr)
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{}
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LocalSourceSource::~LocalSourceSource()
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{}
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void LocalSourceSource::pull(SampleVector::iterator begin, unsigned int nbSamples)
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{
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std::for_each(
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begin,
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begin + nbSamples,
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[this](Sample& s) {
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pullOne(s);
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}
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);
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}
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void LocalSourceSource::start(DeviceSampleSink *deviceSink)
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{
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qDebug("LocalSourceSource::start: %p", deviceSink);
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if (m_running) {
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stop();
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}
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if (!deviceSink) {
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return;
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}
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m_sinkThread = new LocalSourceThread();
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if (deviceSink)
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{
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m_localSampleSourceFifo = deviceSink->getSampleFifo();
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m_chunkSize = deviceSink->getSampleRate() / 10;
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m_localSamples.resize(2*m_chunkSize);
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m_localSamplesIndex = 0;
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m_localSamplesIndexOffset = m_chunkSize;
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m_sinkThread->setSampleFifo(m_localSampleSourceFifo);
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}
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else
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{
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m_localSampleSourceFifo = nullptr;
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}
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connect(this,
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SIGNAL(pullSamples(unsigned int)),
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m_sinkThread,
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SLOT(pullSamples(unsigned int)),
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Qt::QueuedConnection);
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connect(m_sinkThread,
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SIGNAL(samplesAvailable(unsigned int, unsigned int, unsigned int, unsigned int)),
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this,
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SLOT(processSamples(unsigned int, unsigned int, unsigned int, unsigned int)),
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Qt::QueuedConnection);
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m_sinkThread->startStop(true);
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m_running = true;
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}
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void LocalSourceSource::stop()
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{
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qDebug("LocalSourceSource::stop");
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if (m_sinkThread)
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{
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m_sinkThread->startStop(false);
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m_sinkThread->deleteLater();
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m_sinkThread = nullptr;
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}
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m_running = false;
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}
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void LocalSourceSource::pullOne(Sample& sample)
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{
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if (m_localSampleSourceFifo)
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{
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sample = m_localSamples[m_localSamplesIndex + m_localSamplesIndexOffset];
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if (m_localSamplesIndex < m_chunkSize - 1)
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{
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m_localSamplesIndex++;
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}
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else
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{
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m_localSamplesIndex = 0;
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if (m_localSamplesIndexOffset == 0) {
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m_localSamplesIndexOffset = m_chunkSize;
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} else {
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m_localSamplesIndexOffset = 0;
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}
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emit pullSamples(m_chunkSize);
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}
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}
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else
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{
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sample = Sample{0, 0};
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}
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}
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void LocalSourceSource::processSamples(unsigned int iPart1Begin, unsigned int iPart1End, unsigned int iPart2Begin, unsigned int iPart2End)
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{
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int destOffset = (m_localSamplesIndexOffset == 0 ? m_chunkSize : 0);
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SampleVector::iterator beginDestination = m_localSamples.begin() + destOffset;
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SampleVector& data = m_localSampleSourceFifo->getData();
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// qDebug("LocalSourceSource::processSamples: m_localSamplesIndexOffset: %d m_chunkSize: %d part1: %u part2: %u",
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// m_localSamplesIndexOffset, m_chunkSize, (iPart1End - iPart1Begin), (iPart2End - iPart2Begin));
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if (iPart1Begin != iPart1End)
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{
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std::copy(
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data.begin() + iPart1Begin,
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data.begin() + iPart1End,
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beginDestination
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);
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}
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beginDestination += (iPart1End - iPart1Begin);
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if (iPart2Begin != iPart2End)
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{
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std::copy(
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data.begin() + iPart2Begin,
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data.begin() + iPart2End,
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beginDestination
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);
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}
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}
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